RF Path Management for ASDIV Signal Attenuation
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Solution Overview
Problem
Wireless communication systems face signal loss and degradation due to overlapping frequency bands between coexisting networks like WWAN and WLAN, which existing technologies fail to adequately address, leading to inefficiencies and potential hardware damage.
Innovation Solution
A method for a user equipment (UE) to detect signal attenuation exceeding a threshold value and remove associated RF paths from candidate sets for transmit antenna switch diversity (ASDIV), using RF extractor circuits to manage antenna sharing and prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RF paths are shared between coexisting networks (WWAN and WLAN), then antenna versatility is improved, but signal loss and interference increase
Solution Approach 1:
The system dynamically adjusts the set of candidate RF paths for ASDIV based on the operating frequency. When the operating frequency falls within a rejection band of the RF extractor, the system automatically removes affected RF paths from the candidate set. This dynamic adaptation allows the system to maintain antenna sharing versatility while avoiding signal loss by excluding problematic paths in real-time.
2Reliability
If all candidate RF paths are used for ASDIV, then antenna diversity performance is improved, but hardware damage risk increases due to signal attenuation
Solution Approach 1:
The system performs preliminary detection to identify RF paths with significant signal attenuation (exceeding a threshold value) before they can cause hardware damage. By proactively removing these harmful RF paths from the candidate set based on frequency analysis, the system prevents potential hardware damage while maintaining reliability through the remaining safe paths.
3Adaptability or versatility
If RF extractor is used to manage antenna sharing, then network coexistence capability is improved, but signal attenuation in rejection bands increases
Solution Approach 1:
The system extracts and removes RF paths that pass through the RF extractor's rejection band from the candidate set. By identifying and excluding these specific paths when the operating frequency falls within the rejection band, the system eliminates the harmful signal attenuation caused by the RF extractor while preserving the network coexistence capability through proper path selection.
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for a UE to determine whether to maintain or remove a radio frequency (RF) path from a set of candidate paths considered for transmit antenna switch diversity (ASDIV). The determination allows the UE to avoid signal loss or degradation in coexisting networks at similar frequency ranges. For example, ASDIV allows two or more antennas to form different input and output ports to establish different RF paths. Coexistent networks, such as wireless wide-area-network (WWAN) and wireless local-area-network (WLAN) may utilize different RF paths to optimize reliability and efficiency. The overlapping of the bands may cause signal attenuation or degradation from at least one of the networks. The present disclosure provides techniques for detecting signal attenuation at least partially caused by overlapping bands and removing an associated RF path to avoid such signal loss or attenuation.